Elevator safety device.



A. M. COYLE. ELEVATOE SAFETY DEVIOE. APPLIoATIoN Plum JULY 12,1911.

Patented July 7, 1914.

2 BHEBT8-SHBBT l.

THE MORRIS F'ETE'RS CO4, PHUYOLITNOV. WASHINGTON. D C,

A.M.COYLR ELEVATOR SAFETY DEVICE. APPLIOATION FILED JULY 12,1911.

1,102,246. Patented July 7, 1914.

2 SHEETS-SHEET 2.

WITNESSES: l

ATTURN EY INVENTOR THE NORIS PETERS CU PHON-LITHO., WASHINGYUN. D. C.

lll

ANDREW COYLE, OF NEW YORK, N. Y.,

GURNEY ELECTRIC ELEVATOR COMPANY, OF HONESDALE,

CORPORATION OF PENNSYLVANIA.

np s'rnrs repent OFFICE ASSIGNOR, BY 'MESNE ASSIGNMENTS, T0 PENNSYLVANIA, A

ELEVATOR SAFETY DEVICE.

License.

Specification of Letters Patent.

Continuation of application Serial No. 559,303, filed Moy 4, 1910.` This application led July 12, 1911. Serial No. 638,187.

To all whom it may concern:

Be it known that I, ANDREW M. Cornu, a citizen of the United States, and a resident of the borough of Manhattan, in the city, county, and State of New York, United States of America, have invented certain new and useful Improvements `in Elevator' Safety Devices, of which the following is a specification.

My invention relates to elevator safety devices or clutches such as are used to lock elevator-cars to the guides over which they run. Its object is to improve upon such apparatus and to provide a simple mechanism of this kind which cannot be subjected to severe strains and by means of which the car may be brought to rest g'adually but positively. rlhis and other objects of my invention will appear in the following specification in which 1 will describe my invention, and the no'vel features of which I. will set forth in the appended claims.

This application is a continuation of a former application for patent Serial No. 559,303 filed May 4, 1910.

Referring to the drawings, Figure 1 is a bottom plan view of an elevator safety device made according to my invention, with the rails with which it is ar 'anged to engage shown in section. Fig. 2 is a side elevation, partly in section, of the same device. In Fig. 3 I have shown some of the parts of this device in sectional end elevation, the section being taken on the line 3-3 of Fig. 1. F ig. 4 shows a detail of construction, this figure illustrating the `connection between one of the weighted arms and the actuating shaft of the safety. Fig. 5 is a diagrammatic representation of the manner in which this device, connected with an actuating governor.

Like characters of reference designate corresponding parts in all of the figures.

10 designates a portion of an elevator-car, and 11 its hoisting cable.

12, 12 are guides over which the car travels.

Under the floor of the car is my novel safety device, which comprises a pair of channel irons 20, 20, the ends of which are riveted to the upright channels 21 `which form a part of the frame of the car.

22 are brackets secured to the channels 20 when on an elevator, is

near their ends. These brackets support vertical pins 23 each of which serves as a pivot fora pair of clamping jaws 24:, 25. The outer portions of these' jaws are arranged to engage with and to be forced upon the guides 12. On the other side of the pivots they are carried in toward the center of the car, and carry, near their inner ends, antifriction rollers 2G and 27. The inner portions of these jaws are so constructed that they form guide-frames for wedges 2S which lie between them and which, when moved to\\".\rd each other, act against the rollers 26 and 27 to force the jaws onto the guides by forcing their inner ends apart. The manner in which this operation takes place will be more specifically set forth hereinafter.

30 is a shaft which is rotatably supported in links 3l, `which are swung from a supporting shaft 32, passing through the channel-irons 20. A yoke 33, which is rigidly atlixed to the shaft 30, is connected by links 29 with both of the wedges 28. The shaft 3() projects beyond one of the channel-irons 20, and this projecting end is threaded as is shown at 34. A drum is loosely mounted upon the smooth portion of this projecting part of the shaft, but is provided with arms 36 which engage a threaded block 37 on the threaded portion of the shaft in such a way as to cause the block to rotate with the drum, and to have a longitudinal movement on the shaft at the same time.

38 is a spring surrounding the shaft and interposed between the drum and the threaded block.

39 designates a friction disk rigidly allixed to shaft 3() and arranged to engage with a friction surface on the face of the drum 35.

Zl0 is an arm al'tixed to the shaft 30. This arm carries on its outer end a heavy weight ll. A pin Ll2 projecting from one side of this arm is engaged by a latch 41:3 which is loosely pivoted upon a shaft 4.4, which is rotatably supported by bearings on the chan-l nel-irons 20. The latch al?) has a releasing arm 115 which extends into a position near the seat of the inner flange of the drum On this seat of the drum flange is a shoulder t6 which is arranged to engage with the releasing arm Ll5. 47 is a rod connected with `this releasing arm which may be carried up to such a position that it may be actuated Patented July 7, 1914.

Cil

by an operator in the car. 50 designates another arin which carries on its outer end a heavy weight 5l. rllhis arin is not directly atlined to the shaft 30 but between it and the shaft is a collar 52. rlhis collar is atxed to the shaft and has projecting from it a lug 53. The hub or the arin 50 is loosely mounted upon this collar and is cut away to clear the lug so that the shaft and collar inay have a certain ainount of movement without affecting the arin 50.

A pin 54, projecting from one side of the arnr FO3 is engaged by a latch which is ailised to one end ot the shaft 44. lts releasing arrn 5C is also ailixed to sha-tt 44 in such a position as to cause it to be engaged by a shoulder 57 projecting trein the outer' side ol the drinn flange. rthese shoulders are atlixed at dilterent circumferential positions. il releasing rod 58 is also connected with the releasing arin 56.

@n the inner side of the drinn 85 is a bevel gear 60 which inay be an integral part of the drunn or it niay be a separate ineinber aizied thereto. A pinion Gl is in lnesh with this gear. 'llhe spindle to which this pinion is .ined is designated by 62. lts upper end is squared oii' so that it may be turned by a socln-tfwreneh through the iioor ol.3 the car l0. 'lhis spindle inay be supported by a bracket 63 which has a bearing on the end of the supporting shaft 32 and another on the shaft 3G, so that with the links it helps vto support the shaft 30.

ln ll" Y. one or the rays of actuating this satety de ice is shown. in this igure designates a centrifugal governor. An endless rope il, running over the go-vernor sheave 72 is connected with 'the car l0 by ineans of a light yieldable leaf spring 13 t U ferner will be driven by the so that` the go* inoveinent et he car. i3 is a weighted sheave in th ower loop of the governor rope which se res the purpose of keeping it taut and in driving engagement with the governor sheave. ylhe rotation thus iinparted to tl Ternor has a tendency to throw 4 outward and this will f K zinst the action of a weight ils oon as the speed of the car and the governor exceed a predetermined amount this will throw a clainp 77 into engagement with the governor rope and will lock it against further movement. 78 is another rope one end of which is secured to the drinn 'z around which it is given several convolution-s. .lts other end is then carried under a shea vc 14 on the car and up to the point- 79 on the governor' rope to which is is securely attache l. Alfter the governor rope has been thus locl'ed a. further Inovenient of the car will first release the spring connection between the car and the governor rope and will then cause a pull to be exerted upon the rope T8. rllhe latter will then be unwound from the drum 35, causing it to rotate. This part of the operation is co1ninon practice and is welhknown in the art. New as soon as the druin is rotated the shoulder 46 will be brought into engage nient with the releasing arin 45 and will cause the latch 43 to be reinoved trein the pin 42. The weighted arin 40 will then drop causing a partial rotation of the shaft 30, which7 through its connection with the wedges 28, 2S, will cause them to be drawn together between the antiriction rollers which will force the jaws 24, against the guides l2. Thus a positive braking torce will be immediately applied to the car as soon as the rotation of the drum 35 coniinences. The swinging support of the shaft 30 equalizes the pressure which the two wedges produce on their respective pairs of jaws. The lost inotion connection between the shaft 30 and the weighted arin 50 permits this slight rotation of the shaft without affecting the arni 50. lli the braking etlieet thus produced is not sufficient to stop the car a further rotation of the drinn 35 will bring the shoulder 57 into engagement with the releasing arin 56 and will inove the latch 55 away from the pin 54. rlhis will let the weighted arin 50 drop and it will have a tendency to further rotate the shaft 30 and to torce the jaws inore tig1 tly on the guides. A spring or other butler inay be interposed between the arni 50 and the collar 52 if desired to avoid jarring when the lost motion between these parts is taken up.

l will now describe the further operation of this device it' the car still continues its ,inoveinent rlfhe rotation of the drinn 35 has been moving the threaded bloeit 37 in against the spring 35h and these parts are so set that they beeoine eil'ective to press the friction surface of the drinn against the triction disk 39 at about the tiine the weighted arin 50 is released. rlhe drinn will then have a tendency to rotate the shaft 3G with it to still further tighten the locking jaws. rl`he compression or the spring 38 is continually increasing and consequently the slippage between the drinn and the friction dist; is decreasing. This is ot importance because it causes the car to be brought to rest gradually but inore especially because ot the fact that it prevents anv undue strain being put upon the ropes 7l and 78, as is the case in the l arrangements now in use. lt is to be noted that through the connections with the rods 47 and 58, the operator in the car may release either or both of the weighted arnis at will and inay thus retard or stop the car in an eine gency. The spindle 62 is provided. so that the safety device inay be reset after it has been operated. lt inay be seen that by it the drum may be rotated in the opposite direction to that imparted to it by the rope 78. and will push the threaded block 37 back until a lng on the back of it engages with a lug on a stop OAsecured to the threaded portion of the shaft 30, after which the shaft will be rotated with the sheave. rIlien the jaws will be released, and both of the weighted arms will be raised and latched, and the device reset with its parts in their initial positions.

What I claim is l. In an elevator' safety device, a pair of locking jaws, mechanism for forcibly moving said jaws toward each other, said mechanism comprising a plurality of weights for actuating said mechanism, and means for successively releasing said weights.

2. In an elevator1 safety device, a pair of locking jaws, mechanism for forcibly moving said jaws toward each other, said mechanism comprising a plurality of weights arranged to actuate said mechanism, and a rotatable member, said member being arranged to successively release the weights and to act upon said jaws cumulatively with the weights.

In an elevator safety device, a pair of locking jaws, a caln for forcibly moving said jaws toward each other, a weighted arm arranged to move the cam, and a rotary member arranged to release the weighted arm and to impart further movement to the cam.

il. In an elevator safety device, a pair of locking jaws, a cam for forcibly moving said jaws toward each other, a weighted arm arranged to move the cam, and manual means for releasing said weighted arm.

5. In an elevator' safety device, a pair of locking jaws, a cam for forcibly moving said jaws toward each other, a weighted arm arranged to move the cam, a rotary member' arranged to automatically release the weighted arm, and manual means for releasing the weighted arm.

G. In an elevator-safety device, a pair of locking jaws, a cam for forcibly moving said jaws toward each other, a plurality of weighted `arms arranged to move the cam, and manual means for releasing one or more of said arms.

7. An elevator-car, a safety device therefor, said device comprising a pair of locking jaws, a cam for forcibly moving said jaws toward each other', a plurality of weighted arms, each arranged to move the cam, means for automatically releasing said weighted arms successively, and means manually operable from the car for releasing one or` more of said arms. 4

8. In an elevator safety device, two pairs of locking-jaws, a cam for each pair of jaws for forcing the jaws of each pair toward each other, said cams having linear paths of movement, a rotatable actuating shaft, at right-angles to the path of movement of the This will wind up the rope 78 cams, eccentric connections between the shaft and the cams, and a swinging support for said shaft.

9. An elevator-car, a safety device therefor, said device comprising a pair of lockingjaws, mechanism for forcibly moving said jaws toward each other, said mechanism comprising a plurality of weights arranged to actuate said mechanism, and a rotatable member, said member being arranged to snccessively release the weights and to act upon said jaws cumulatively with the weights; and means manually operable from the car for resetting the weights and the rotatable member.

10. An elevator-car, a safety device therefor, said device comprising a pair of lockingjaws, a cam for forcibly moving said jaws toward each other, a plurality of weighted arms each arranged to move the cam, a rotatable member arranged to automatically release said arms successively, and means manually ope4 'able from the car for resetting the weights and the rototable member.

11. In an elevator safety device, a pair of locking-jaws, means for forcibly moving said jaws toward each other, said means comprising a rotatable member, a frictional connection between the jaws and said member, and means for causing the pressure at said frictional connection to be progressively varied by the rotation of said member.

12. In an. elevator safety device, a pair of pivoted locking-jaws, a cam for forcibly movingsaid jaws toward each other, a rotatable sheave for moving the cam, a frictional connection between the sheave and the cam, and means for causing the pressure at said frictional connection to be progressively increased by the rotation of said sheave.

13. In an elevator safety device, a pair of pivoted locking jaws, a cam for forcibly moving said jaws toward each other, a weighted arm arr: nged to actuate said cam, a rotatable sheave arranged to release said arm, a frictional connection between the cam and said member whereby the rotation of said member may also move the cam, and means for causing the pressur'e at said frictional connection to be increased by the rotation of said sheave.

lll. In an elevator safety device, a pair of pivoted locking-jaws, a cam for forcibly moving said jaws toward each other, a plurality of weighted arms each arranged to move said cam, a rotatable sheave arranged to successively release said weighted arms, a frictional connection between the cam and said sheave whereby the sheave may also move the cam, and means for causing the pressure at said frictional connection to be increased by the rotation of the sheave.

15. In an elevator safety device, two pairs of pivoted locking-jaws, a cam for each pair of jaws for forcing the jaws of each pair to- Ward each other, said cams having linear paths of movement, a rotatable actuating shaft at right-angles to the path of movement of the cams, eccentric connections between the shaft and the cams, and a swing-l ing support for said shaft; a plurality of weighted arms on the actuating shaft each arranged to actuate said shaft, a rotatable sheave loosely mounted on the shaft, said sheave beingarranged to successively release said Weighted arms, a fiietional connection bet-Ween the sheave and the actuating shaft whereby the sheave may also actuate the shaft, and means for causing the pressure of said frictional connection to be increased by i5 the rotation of said member.

lnk testimony whereof l have signed my name to this specification in the presence of two subscribing Witnesses.

ANDREW M. COYLE. Y

Witnesses:

ERNEST YV. MARSHALL, GERTRUDE NEUSER.

Copies of this patent may be obtained for five cents each, by addressing the 4 Commissioner of Patents, Washington, ID. C. 

